Hey guys, I noticed on my bike this morning on my way home from work, when I hit a bump in the road, there is a knocking sound. It sounds like something is banging around below me. I checked everything to make sure it was all nice and tight. Checked under the seat, exhaust, fender, everything you can think of that would make such a noise. Has anyone else noticed this. It has not done this since I have had it. I bought it June 19 or there abouts, and have about 1400 miles on it.